Hello Down There (1969)

Given the chance to live in a simulated underwater home for a month, a scientist convinces his family to take advantage of the offer. Once the family agrees to move in, underwater mayhem occurs!

Directed by: Ricou Browning, Jack Arnold

Starring: Tony Randall, Janet Leigh, Ken Berry, Roddy McDowall, Charlotte Rae, Richard Dreyfuss

Links: IMDb, Movie posters, Movie stills